Dry battery



Nov.v16 1926. 4

H. sHlMlDZU DRY BATTERY v Filed Jan., 28. 1926 A Patented Nov. 16, 1926.

UNITED STATES.

PATENT oFFlcE.;

H ANBEY SHIMIDZU, F YOTSUYAKU, TOKYO-SHI, JAPAN.

DRY BATTERY.

Application med January 2s, 1926, serial No. 84,505, man Japan mgm 1a, 1925.

This invention has relation to dr batteries, and has for its primary obyect to provide a safety cell which will be proof against the formation of' any electric short 5 circuits, which in other batteries of the type have occurred frequently from careless handling or unavoidable accident. y

A further object is to produce a dry batl tery having inner electrical terminals which 1u will be iirm and steady against an outer mechanical forces. A still'further o ject is to simplify the construction of the dry batteiy and to improve its appearance.

eretofore, the electrical terminals of dry batteries have been so arraneed as to project beyond the bodies of the cells and hence, if on account of careless handling, any electrical conductive material lies upon the terminals, there are formed electrical short circuits through such conductive material. And

in previously constructed batteries, the proljective terminals are not only liable to 1mpinge a einst other objects, causing damage or s aking, but by reason of their con- 2l 'structiontake time and skill to connect with the leading Wire.

-According to the present invention, these defects lare obviated, and the` batteries rendered easier and safer to handle, as well as'l so more eiiicient and durable. f

In the accompanying drawing,l forming part of this specification,

Fig. 1 is a cross sectional side view of part of a set of batteries in parallel con 85 nection and adapted for special use in wireless telephony. l

Fig. 2 is a cross sectional view of a ternunal connection plug'tted to the batteries shown in Fig. 1.

40 Referring now more particularly to Figure 1, 1 designates the usual zinc casing; 2 are the partitions, i. e. the `zinc barriers which mark off one unit of the cells 3 from Ianother'I in the casing. 4 are the carbon y plates or rods; 5 is the asphalt or other sealing paste, and in such sealing layer, I bury the electric conductive tube which is the terminal of the anode carbon 4.- and connected to said tube by the conducting Wire 7. In l0 the inner end of the opening or bore of the terminal tube 6, an ebonite or other nonelectric conductive ring or collar 8, is in- 'serted, to prevent the collapse of the edge of the asphalt'ibpening in 'which the collar 8 is seated.

For insertion in the terminal tube 6, rthere is provided a plug which is illustrated in Fig. 2, its contact piece 9, being formed with" slits 10 to provide, elasticityand ensure clos'e electrical contajet; with t-hensaidjtube 6.' ,The contact piece 9` is connected to a leading'wire 11. lVhen the plug is inserted in the terminal tube 6, they will be kept tightly and securely in contact with eachother, and the electric current will lvout b the leading wire Without obstruction. An as the plug, furthermore, can be conveniently and easily taken out, this'invention is particularly Welladapted for use in wireless telephony, the dry batteries of which have more than two terminals,.e'ach terminal having to be carefully selected for use fonA, B, or C batter-ies. Fory wireless use it is important that all of these terminals should be, and accord-v ing toi my inventionareembedded in the sealing asphalt layer 5. f-

The form andconstructon of the terminal 6 are variable, for example. the bore of the tube may be screw-threaded or a simple solid stem may be used instead of the `tube.

In the former case a suitable screw plug would be used to make connection, instead of a slitted piece, and in the latter case a fitted tube may be combined as the plug.'

I claim:

1. A dry battery having metallic terminals embedded in the sealing medium wholly below the surface of the latter, and having a collar of insulating material embedded in the sealing medium above such terminals and adapted for the insertion of plugs therethrough into contact with the metallic terminame to this specification at Tokyo, Japan,

this 30th day of Dec., 1925.

HANBEY SHIMIDZU,

IUD 

